Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Electromagnetism: Understanding Magnetic Forces and Fields - Prof. Timothy H. Farris, Study notes of Physics

An introduction to the magnetic forces between two parallel conductors, ampere's law, the magnetic field of a solenoid, magnetic flux, gauss' law in magnetism, and the displacement current and the general form of ampere's law. It includes examples and formulas for calculating magnetic fields and current requirements.

Typology: Study notes

Pre 2010

Uploaded on 08/18/2009

koofers-user-f7a
koofers-user-f7a 🇺🇸

5

(1)

10 documents

1 / 12

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Title:Mar257:59AM(1of11)
pf3
pf4
pf5
pf8
pf9
pfa

Partial preview of the text

Download Electromagnetism: Understanding Magnetic Forces and Fields - Prof. Timothy H. Farris and more Study notes Physics in PDF only on Docsity!

30.3 Ampere's Law

Consider a loop of B field around a wire:

Ampere's Law

where I is the current surrounded or enclosed by the path of

integration.

We can apply Ampere's law to find magnetic fields in some

cases. For example, the field around a wire:

Example: Suppose you want a 1.00T field inside a coil in an

MRI machine that's 0.800 m long & consists of 50,000 turns

of wire. What current is required?

30.5 Magnetic Flux

Just like the electric flux, we can define themagnetic flux, Φ

, as the # of B field lines going through an area.

Units of flux:

[ Φ ] = T∙ m² = weber (Wb)

30.7 Displacement Current and the General Form of

Ampere's Law

Consider charging

the capacitor at the

right.

There is something else happening here that is not

accounted for in Ampere's law; Ampere's in not complete

  • Ch 30: pp
  • P 17, 23, 33, 34,